PSYC 345 Chapter Notes - Chapter 10: X-Inactivation, Allosome, Y Chromosome

• School: Chico State University
• Department: Psychology
• Course: PSYC 345
• Professor: Morgan Bailey

Document Summary

1 pair sex chromosomes: f= xx, m= xy, sex linked traits: trait controlled by gene on x chromosome (occasionally on y chromosome, y chromosome. Co(cid:374)tai(cid:374)s sry ge(cid:374)e (cid:449)hi(cid:272)h dire(cid:272)ts fetus"s go(cid:374)ads to differe(cid:374)tiate (cid:373)ale dire(cid:272)tio(cid:374), forming testes/testosterone: x chromosome. Influ. many aspects of functioning cells, growth, & devel. Contains genes respons. for differentiation of ovaries during fetal devel. X-chromosome inactivation: in f, process which 1 of the 2 x chromosomes is inactivated/silenced in nearly ev. cell so that only 1 chromosome functions. Genomic imprinting: in f, process in which some genes from maternal x chromosome/some genes from paternal x chromosome are expressed: autosomes are source of genetic gender sim. ; sex chromosomes are sources of genetic gender diff: epigenetics: changes in gene expression caused by factors oth. than dna. Environ. experiences can modify whether certain genes are expressed/not in indiv. Sex hormones: endocrine glands secrete hormones into bloodstream so they have effects throughout the body.